EP 4161889 A1 20230412 - REMOVAL OF ACETALS FROM PROCESS STREAMS
Title (en)
REMOVAL OF ACETALS FROM PROCESS STREAMS
Title (de)
ENTFERNUNG VON ACETALEN AUS VERFAHRENSSTRÖMEN
Title (fr)
ÉLIMINATION D'ACÉTALS À PARTIR DE FLUX DE TRAITEMENT
Publication
Application
Priority
- US 202063034086 P 20200603
- US 2021035689 W 20210603
Abstract (en)
[origin: WO2021247855A1] A process for producing acetic acid is provided that is capable of lowering acetaldehyde mass composition in acetic acid. The process for producing acetic acid according to the present invention comprises at least one distillation step that satisfies the following operating conditions (i) temperature in a lower portion of the distillation column is not less than 40 °C; (ii) water mass composition in the lower stream is not less than 0.3 wt.%; or (iii) acetic acid mass composition in the lower stream on weight percentage basis is greater than the acetic acid mass composition in the first mixture; wherein the methanol mass composition in the first mixture is less than or equal to 2 wt.%.
IPC 8 full level
C07C 17/386 (2006.01); C07C 19/07 (2006.01); C07C 45/83 (2006.01); C07C 47/07 (2006.01)
CPC (source: EP KR US)
C07C 17/386 (2013.01 - EP KR); C07C 45/83 (2013.01 - EP KR US); C07C 19/07 (2013.01 - KR); C07C 47/06 (2013.01 - KR)
Citation (search report)
See references of WO 2021247855A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2021247855 A1 20211209; CN 115715281 A 20230224; EP 4161889 A1 20230412; JP 2023528452 A 20230704; KR 20230019135 A 20230207; MX 2022015383 A 20230116; TW 202212311 A 20220401; US 2023202955 A1 20230629
DOCDB simple family (application)
US 2021035689 W 20210603; CN 202180040043 A 20210603; EP 21737850 A 20210603; JP 2022574394 A 20210603; KR 20227045636 A 20210603; MX 2022015383 A 20210603; TW 110120146 A 20210603; US 202117928569 A 20210603